Mower-knife grinder.



R. G. KENNEDY.

MOWER KNIFE GHINDER.

(Application led June 7, 1900.5 nu Model.) 2 snaet-sheat l.

No. 662,793. Patented Nov. 27, |900.`

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No. 662,793. l Patented Nov. 27, |900. R. G. KENNEDY.

MUWER KNIFE GRINDER.

(Application med June 7, 1900.)

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RICHARD G. KENNEDY, OF PITTSBURG, PENNSYLVANIA.

MOWERWKNHFE GHBINDEH.

srnclrrcamlolv forming part of Letters Patent No. 662,793, datedNovember 27. 1900- llpplication filed June '7, 1900. Serial No. 19,389.(No model To all whom it mfrtygoorwer'n:

Beit known vthat I, RICHARD G. KENNEDY, a citizen of the United States,residing at Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inMower-Knife Grinders; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to edge-tool grinders, but more particularly tothat class commonly known as mower and reaper knife grinders, and hasfor one object to provide a portable grinder of the above-named classwhich can be readily attached to the wheel of a mower or reaper for thepurpose of grinding the knife or which may be permanently attached to atable, bench, or the like in a manner which will hereinafter beexplained.

A further object of my invention is to provide a mower and reaper knifegrinder whereby the last or end sections of the knifecan be ground aseasily and as perfectly as the` central sections, the length or size ofthe knifehead being immaterial.

My invention also consists in certain other novel features which will behereinafter more fully described, and afterward specifically pointed outin the appended claims.

Referring to the accompanying drawings, Figure 1 is an elevation of mygrinder in an operative position attached to a section of a mower-wheel,the knife being broken away. Fig. 2 is atop plan view of the same. Fig.3 is a sectional view taken on the lines X X of Fig. 4 is a sectionalview of the emerywheel and means of securing same. Fig. 5 is aperspective view of one-half the standardarm casting. Fig. 6 is asectional view of the knife-holder and swivel-plate.

The same numerals of reference indicate like parts throughout theseveral figures, in which- 1 indicates the base of the grinder, form?ing the horizontal bed-plate 2 and the vertical wall 3, said wallprojecting above the bed-plate to form the arced or segmental ange L1.The Wall3is provided with an opening 5 to form a bearing for the splitstandard 6. The base 1 is also provided with two arms 8, said plateshaving screw-holes 9 for the purpose of securing the grinder to a bench,table, or the like. The oblique side wall 1'0 is provided with a slot 11to receive the bolt 12. The base 1 is cut away above the arms 8, asshown in Fig.`3, in order to accommodate the rim 13 of a mower-wheel.The manner of fastening the grinder thereto will be hereinafter morefully described.

The bed-plate 2 is provided with a central tapering opening 111. Theswivel-plate 15 is substantially elliptical in form and is provided withtwo openings 16 and 17. The opening 16, which forms a bearing for thepin or bolt 18, is deeper than the body of the swivelplate, the taperingwall being adapted to set down into the opening 14 of the bed-plate 2.The opening 17 in the swivel-plate is for the purpose of carrying thepin or bolt 19 and forms a boss 17a on the face of the swivelplate toact as a bearing for the knife-holder, Fig. 6.

The knife-holder 20, substantially rectangular in form, rests upon theswivel-plate 15 and is provided with a transverse slot 21, whereby theknife-holder 20 is capable of a sliding motion on the boss or bearing17a.

The knife-holder 20 has a vertical side 22 and an inwardly-curved side23, said curved side having a Iiange at its top. The vertical side 22 ofthe knife-holder 20 has a central vertical slot 25 and two verticalpointed projections 26. A small bolt or pin 27 holds the adjustable clip28 to the vertical side 22, said bolt or pin being raised or lowered inthe slot 25. The clip 28 is provided at its back with two verticalangular recesses which register with the projections 26 on the verticalside 22, thus insuring to the clip a perfectly steady and uprightposition. The knife-holder 2O is sufficiently large to admit the head ofthe knife to enter, and clip 28 can be adjusted so as to accommodatelong or short heeled sections.

The standard-arm 6 is cast in two sections.

`Said standard is provided with the bolt-openbetween its head and thewheel 32, passes through the hollow bearing 31.

The projec- IOO tion 7opposite the bearing 31 enters the opening 5 inthe vertical wall 3 of the base l. A washer 35 and nut 36 hold thestandard-arm securely to the base and the gear-wheel 32 on its bearing31.

A small strip of felt or blotting-paper 3l is placed between the twosections of the standard 6 in order to cushion them and keep the oilfrom running down between the two. At the top of the standard 6 is ajournal38, which carries the spindle 39 of the emerywheel 40, thejournal 3S and bearing 3l having suit-able lubricating-inlets. A bolt 4lis held in the transverse opening 30 in the standard 6, its head 42engaging the arced flange 4 of the base 1, Fig. L. A cam-lever 42 isarranged between the nut 43 and the standard 6, whereby the bolt-head 42can be drawn tightly against the lange 4, thus securely holding thestandard.

The emery-whcel 40 is provided on both faces with a circular recess 44and a central opening 45. A dat-headed bolt 46 passes through theopening 45, and a washer 47 is placed between the bolt-head and theemerywheel. Aretaining-washer48 is placed within the inner circularrecess 44 and bears against the emery-wheel. The retainingwasher 48 isrecessed inits inner face to hold the spindle 39 and is provided thereinwith two projecting nibs 49. The hollow spindle 39 is provided withcorresponding notches which register with this nib 49, thus making arigid connection between the retaining washer 4S and the spindle 39. Thesmall gear wheel or pinion 50 is also recessed in its inner face to holdthe other end of spindle 39 and is -also provided therein withprojecting nibs 5l,

which register with corresponding notches in the spindle 39, thus makinga rigid connection between the wheel 50 and the spindle 39.

When the nut 52 is threaded snugly on the bolt 46, it presses theretaining-washer against the inner -face of the emery-wheel 40 and pullsthe washer 47 against the outer face of the emery-wheel and holds theprojecting nibs of the retaining-washer 4S and the pinion 50 inengagement with the notches in the spindle 39, thus making a solid rigidconnection between the emery-wheel 40 and the pinion 50, the objectofthis connection being to provide Aa spindle for the emery-wheel whichwould be interchangeable and which would not interfere with the face ofthe emery-wheel and which would permit of an enormous wear on the same.Another object is to make the wheel reversible when one face is worn.

As aforesaid, the base 1 is cut away above the arms 8 in order to allowthe rim 13 of the mower-wheel to pass over the arms S. The

oblique wall 10 of the base l is of such a length that it rests upon thetread of the mowerwheel. The catch 53 is caught under the opposite sideof the rim, and the cam-wrench lever 54 tightens the catch 53 and holdsthe grinder securely to the wheel.

Having thus specically described the several parts of my invention, itsoperation is as' follows: When' the grinder is secured to the mowerWheel or bench, as described, thc knife is inserted in the holder, thehead being held in the left hand, and as the holder works on aswivel-plate it can be thrown to any position along the arrows in Fig.2. The standard carrying the emery-wheel being pivoted to the base canalso be thrownin any position, as shown in dotted lines in Fig. l, and

securely held b V means of the cam-lever 42. Thus any section of theknife or any part of a section can be easily and quickly ground. Fig. 2shows a section being ground on the side nearest the head. By throwingthe holder on the outside on the emery-wheel and slanting the knife inthe opposite direction, as shown in dotted lines, the sections areground on the other edge. Itis thus obvious that any position can bethus obtained and the last section nearest the head can be as easily andas quickly ground as the central or intermediate sections.

Having thus described the operations of my invention, I do not wish tobe understood as limiting myself to the exact construction herein setforth, as I consider myself entitled to any changes or modificationsmade therein which fall within the limit and scope of my invention, and

What I claim as new, and desire to secure by Letters Patent of theUnited States, is-

,l. In a mower-knife grinder, the combination of the base forming thebed-plate, the split standard pivoted thereto, the swivelplate mountedthereon, and the adjustable knife-holder, substantially as described.

2. In a mower-knife grinder, the combination of the base, the verticalside or wall formed thereon, the arced or segmental flange formed onsaid wall, the split standard, a bolt and cam carried thereby, said boltengaging said flange, and a grinding-wheel, substantially as described.

3. In a mower-knife grinder, the combination of the base, a verticalwall or side formed thereon, and having an opening in its face, a splitstandard-arm secured in said opening, said standard-arm forming abearing on its lower end for the gear-wheel, and a journal for the shaftof the grinding-wheel, and av grinding-wheel, substantially asdescribed.

4. In a mower-knife grinder, the combination of the base, the arms 8,the vertical side or wall formed on said base, the split standardcarried therein, the oblique side formed on said base, provided with avertical slot, a bolt carried in said slot, a catch carried on saidbolt, a cam-wrench lever on said bolt, all arranged in such a mannerthat the plates 8 are held under the rim of the mower-wheel, the obliqueside resting on the tread of the mower-wheel, substantially asdescribed.

5. In a mower-knife grinder, the combination of the base, a bed-plateformed thereon, a swivel-plate carried on said bed-plate, a knife-holdermounted on said swivel-plate, a

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verticallyadjustable clip carried by said knife-holder, and means forholding said clip in an upright and in adjusted position, substantiallyas described.

6. In a mower-knife grinder, the combination of the base, splitstandard-arm mounted therein, a grinding-wheel recessed on both faces, aretaining-Washer in the inner recess, nibs in said retaining-washer, ahollow spindle, a pinion, nibs in the inner face of said pinion, andnotches in the ends of said spin' 9. In a machine for grindingmower-knives, the combination of a base, a split standard pivotallysecured thereto, a grinding-wheel, means for securing said standard inany position within its limit of adjustment,substantially as described.

l0. The combination in mowerknife=grind ing machines of the sectionalstandard-arm, having a journal and a bearing at each end for the purposedescribed, the intermediate hollow steel spindle having notches at eachend, pinion or washer having recesses or seats to correspond to the endsand to hold the hollow shaft in position, projecting nibs in saidrecesses to correspond with said notches in the shaft and to t therein,a securing-bolt passing through the pinion, the hollow spin dle and theWasher by which all the parts are solidly secured together for jointoperation as set forth.

In testimony whereof I aiiix my signature in presence of two witnesses.

RICHARD G. KENNEDY.

Witnesses:

JOHN F. SWEENY, RoB'r. B. WHITING.

